Sunday, October 3, 2010

Foundation of Non Circuit Engineering (Engineering Mechanics)

Before Mechanics

Measurement of angel’s : There are two common systems of measuring angel’s

1.sexagesimal measure : According to this system, divide a right angle 90 into equal parts called degrees. Each degree is divided into sixty equal parts called minutes and each minute is divided into sixty equal parts called seconds. Denoting one degree, one minute and one second by the symbols 10 1’1”.

2. Circular measure : The unit of measurement is called radian . ∏ is an irrational number. Its approximate value is 22/7. Its value correct to 5 decimal places is 3.14159. Sometimes1/∏ value also required & is given by 0.31831.